Automatically-threading loom shuttle



Dec. 16, 1930. H. A. DAVIS 1,785,225

AUTOMATICALLY THREADING Loom SHUTTLE Filed Dec. 27, 1929 Illll'm www E iiiiillllllH f1 33 Y /NVENTOR/ ATTORNEY 10 and the Patented Dec. 16, 1930 UNITED STATES PATENTY OFFICE HARRY A. DAVIS, F HOIEDALE, IEASSACI-IU'SEITSgASSIGNOR TOIDRAPER CORPORA- UTION, 0F HOPEDALE, MASSACHUSETTS, A CORPORATION OF MAINE AUToMATreALLY-rrrnnanine Loon SHUTTLE Application filed December 27, 1929. Serial No. 416,776.

This invention relates Vto automatically threading loom shuttles and is more particuV larly direct-ed to the means for applying tension of desired 'character vto the thread during weaving. f

Automatically threading loom shuttles are now ordinarily employed in what are known as feeler looms whereby the filling carrier in the shuttle is changed from time to time shuttle becomes automatically threaded during u its lpicking' movements.

Some character of tensioning means has heretofore been employ-ed in shuttles of the Aautomatically threading type, and the present invention is directed to a thread tensioning device which shall `present tensioning members located at the front portion of the usual longitudinal thread passage so that on the lirst pick of the shuttle following replenishment the thread will pass into control of the tensioning members and be thereafter subjected to uniform tension throughout the weaving operation.

y `More specifically v stated, the invention e comprises a thread tensioning post preferably mounted in the threading block at the point where the longitudinal thread passage communicates with the side delivery eye, and cooperating with the thread tensioning post is a tensioning plate normally under the inuence of a spring tending to move the plate into tensioning relation with the post. A tensioning device of the general character stated is particularly advanta- -f geous where the lower wall of the thread passage islower than usual, and in order to insure that the thread may not drop out of control of the tensioning members'duringweaving, the tensioning-surfaces of said members extend downwardly beyond the lower wall of thethread passage.

The invention and novel features thereof will best he made yclear from the following description and the accompanying drawings of one good, practical form thereof. In the drawings:

Fig. 1 is a plan View of the delivery end portion of an automatically.` threading shuttle provided with the presentinvention;

e Fig. 2 isa perspectiveview, with parts of the threading block broken away to show more clearly the relation of the tensioning members and longitudinal thread passage;

Fig. 3 is a side elevation of the threading block detached from the shuttle and showing some parts in section i; and t Fig. 4 is a perspective view of the threading block detached from the shuttle, some of the parts broken away, and the lead of the lling thread as it passesaround the tensioning post towards the side deliveryeye.

The shuttlelis provided with the usual "bobbin chamber 2 and the side delivery eye g5 from, which thefilling thread a leads during weaving as it is Withdrawn from the filling carrier of bobbin 4. Frontward of the bobbin chamber the shuttle is provided with the threading block 5 having a longitudinally extending thread passage 6 and an open top portion 7 through which` the thread Vpasses into the longitudinal thread passage on replenishment oflilling. The threading block has' the thread director 8 between the front edge portion of which and a cut-away portion 9 of the shuttle there is an opening for the thread to pass to the side `delivery eye on the second pick of the shuttle following replenishment, and overhanging the end portion of the thread director 8 is a guard 10. As thus far described the thread ing block may be of usual construction and is held in the shuttle by the through bolt 11 as usual. Extending downwardly from the threading block is the lug or pin 12 which engages the usual opening in the shuttle for assisting in positioning the threading block.

Mounted in the threading block at the point of communication between the longitudinal thread passage 6 and the passage leading to, the side delivery eye is a thread tensioning lower portion of the post extends downwardly beyond the lower wall 17 of the thread passage 6, as indicated in Fig. 2. rllhe threading post 13 may be formed of suitable material, such, for instance, as a vitreous substance, or, it may, on kthe other hand, -be formed of metal,^the essentialsin this respect beingthat it shall be positioned to direct the .thread fromthe longitudinal ,thread passage to the side delivery eye,

As hereinbetore indicated, the longitudinal thread passage ot the threading block is formed as a low groove and at the front portion the threading block is cut awayat 18, and from the cut-away portion a pin 19 eX- tends frontwardly to provide an anchoring means for thetensioningplate. rl'he tensioning plate 2O is disposed oppositethetensioning post 13 and has an extended vertical Vthread engaging face which extends below the '24 formed in the side wall of the longitudinal `thread passage, at the front portion thereot, with the result that when the thread passes downwardly into the thread passage of 4the threading block it will be directed between the `thread tensioning plate fand rthread tensioning post, as indicated in Figs. 2 .and Vl.

The thread tensioning plate -is normally under :the influence of a spring tending to move the tensioning plate into tensioning relation `with 'the `tensioning post, and, 'as indicated in thepresent instance of. the invention, the-spring is of the leaf type, orormed as ya tia-t spring plate, the rear portion ot which at '25 is turned fabout'the rear wall 21.3

.of the threading block into Vloop form, and

the outerlportion `thereof is secured to the threading block by a pin 27 which passes `through the wood of the shuttle and th rough the wall 26 of the threading block.

l7itlii11=tl1elongitudinalthread passage the spring Vis turned rontwardlyat 28 :and has an arm '29 extending longitudinally :in :the

thread passage `with its forward end bearing upony the outside surface of the4 tensioning plate 20, with' the result that' theftens-ioni-ng plate is normally:spring-stressed towardsthe tensioning post.

In weaving with dilerentkinds `oflling thread it :is desirable tovary the tensioni-ng eli'ectof therontwar'dly extend-ing arm et' the spring-upon the-tensioning plate,=to thereby vary the' tension exerted Lupon -the ill'ing Lveaea thread, and to this end the pin 27 has a threaded portion 30 engaging a corresponding thread in the side wall 26 of the threading block, so that by turning movement of the pin 27 the tension of the spring arm 28 may be varied During the weaving `operation -the shuttle `is subjected to sudden shocks and iinpulses.I `as welliknown, andto Aprevent dis- Athe shuttle is subjected but isyieldablemievertheless, to permit manual turning ot the pin in Varying the tension of the spring.

From the constructiondescribed-it will be obvious that the present-inventionprovides 4an automatically threading `loom shuttle with a thread tensioning postat'thepoint of communication betweenthe side delivery eye and the longitudinal threadpassage and a cooperating thread tensioning plate between which and the post the'thread is `tensioned during weaving, and both the lower end of the Vthread tensioning post and the lower portion of the thread'tensioningplate extend below the lower wall G ofthe longitudinal thread passage, so that all danger oi the threadpassing below and out ot control ofthe tensioning members is avoided. It will also benoted that the spring arm 28 extends in the longitudinal thread passage frontwardly and that its endbears against the thread tensioning plate, and the tension of the spring arm by the pin 27will remain constant during weaving owing to-the hexagonal portion A3 1 of the pin and the yielding plate 32. i

l/Vhat is claimed is:

1. A11-automatically threadingloom shuttle having alongitudinal thread passage and a side delivery eye communicating therewith that the shuttle may be automatically threaded, a thread tensioning post mounted at the point of communication between the side delivery eye andlongitudinal passage, a tensioning plate supported i-mlependently ot the .postal4 the side of the thread Ypassage opposite the tensioniiigupostra spring secured at the rear of the thread-passage sothat it .supported independently of said plate ,and

having a forwardly `extending 'portion bearmg upon the tenslonmgplatethat the thread ymay be tensionedbetween the post and plate as it passes about the post to the side 'delivery eye.

2. Anautomatically threading `loom shuttle -havinga thread-ing block provided with a longitudinal thread passage,` a side-,delivery eye, a threa'd tensioning post about which lill) the thread passes to the side delivery eye, an upright tensioning plate frontward vof the lower wall ot the longitudinal passage of the threading block and mounted for movement towards and from the thread tensioning post and provided with end portions that extend laterally of the block away from said post, and aspring normally acting to move the tensioning plate toward the post that the thread may be tensioned as it passes about the post to the side delivery eye.

An automatically threading loom shuttle having a threading` block provided with a longitudinal thread passage, a side delivery eye communicating with the longitudinal thread passage that the shuttle may be automatically threaded, a thread tensioning post frontward of the longitudinal passage formed in the threading block, a tensioning plate mounted on the threadingblock frontward of its longitudinal passage for movement bodily relative to said post and extending be- Y low the bottom wall of said passage opposite the tensioning post for movement towards and from the post, and a spring normally acting upon the plate to move it towards the post that the thread may be tensioned as it passes about the post to the side delivery eye.

Ll. An automatically threading loom shuttle having a threading block provided with a longitudinal thread passage, a side delivery eye, a thread tensioning post trontward ot' the lower wall of the thread passage, atensioning plate also frontward of the lower wall ot the thread passage formed in the threading block and provided with a loop, a projection extending frontward of the threading block within said loop to torni a sliding engagement therewith, and a spring normallyacting to move the tensioning plate towards the post that the thread may be tensioned frontward of the lower wall of the thread passage as it passes about the post to the side delivery eye.

5. An automatically threading loom shuttle having a threading block provided withv a longitudinal thread passage, a side delivery eye, a thread tensioning post trontward of the lower wall of the thread passage, a tensioning plate also frontward of the lower wall ot the thread passage formed in the threading block and provided with a loop, av projection extending trontward ol the threading block and loosely engaging said loop and having a head to prevent disengagement of the tension plate trom the projection, and a spring normally acting to move the tensioning plate towards the post that the thread may be tensioned frontward of the lowei wall of the thread passage it passes about the post to the side delivery eye.

5. An automatically threading loom shuttle having a longitudinal thread passage and a side delivery eye communicating therewith that the shuttle may be automatically threaded, a thread tensioning post mounted at the point of communication between the side delivery eye and longitudinal passage, a tensioning plate mounted at the side of the' thread passage'opposite the tensioning post, a leaf spring supported independently of the tension plate and secured at the rear of the threading block and having a frontvwardly extending arm bearing upon the Vspring having a loop secured to the rear oi the threading block and having a trontwardly extending portion bearing upon the tensioning plate, means for supporting the tension l plate independently of the leaf spring, and an adjusting screw bea-ring upon thefrontwardly extending portion of the spring. 1

8. An automatically threading loom shuttle having a. threading block provided with a longitudinally extending thread passage and aside delivery eye, a tensioning post at the front of lthe longitudinal thread passage, a tensioning plate opposite the post, a leaf spring having a loop secured to the rear ot' the threading block and having a trontwardly extending portion bearing upon the tensioning plate, an adjusting screw bearing upon the trontwardly extending portion of the spring and having a iiattened locking portion, and a yielding finger adapted to bear upon the said flattened portion to prevent accidental disturbance of the spring adjustment due to the shuttle movements.

9. An automatically threading loom shuttle having a longitudinal thread passage and a side delivery eye communicating therewith, a thread tensioning post rigidly mounted at the point of communication between the side delivery eye and longitudinal thread passage, a tensioning plate slidably mounted opposite said post at its top and bottom to present a vertical surface to bear latwise against the ifixed tensioning post, and a leaf spring having a forwardly extending arm to bear upon the back ot' the tensioning plate that the thread may be evenly tensioned between the post and tensioning plate as it passes about the post to the side delivery eye.

10. An automatically threading loom shuttle having a longitudinal thread passage and a side delivery eye communicating therewith, a thread tensioning post rigidly mounted atthe point of communication between the side delivery eye and longitudinal thread passage, a tensioning plate protectively mounted opposite said post at its top and bott-oni for sliding movement towards and from the tensioning` post to prevent the thread from passing back of the tensioning plate during shuttle threading and a leaf springhavinga forwardly extending arm bearing centrally on the back of the tensioning plate that the thread may be evenly tensioned between the post and plate as it passes about the post to the side delivery eye.

11. An automatically threading loom shuttle havinga longitudinal thread passage and a side delivery eye communicatingtherewith, a thread tensioning postmounted at the point of communication between the side delivery eye and longitudinal passage, a tensioning plate proteetively mounted in a vertical position opposite said post for sliding movement towards the tensioning post to present a surface to bear latwise against the tensioningY post where the thread passes about the post to the side delivery eye and provided with end portions that extend away from the post, and a spring normally acting` to move the tensioning plate into hearing relation against the post that the thread may be evenly tensioned between the post and plate as it passes about the post to the side delivery eye.

In testimony whereof, I have signed my name to this specification.

HARRY A.,DAVIS. 

